Support drag & drop of plasma:// and plasma+zeroconf:// urls onto plasma containments.

svn path=/trunk/KDE/kdelibs/; revision=1026777

containment.cpp

@@ -56,6 +56,9 @@
 #include "svg.h"
 #include "wallpaper.h"
 
+#include "remote/accessappletjob.h"
+#include "remote/accessmanager.h"
+
 #include "private/applet_p.h"
 #include "private/applethandle_p.h"
 #include "private/desktoptoolbox_p.h"
@@ -1207,13 +1210,19 @@ void ContainmentPrivate::dropData(QPointF scenePos, QPoint screenPos, QGraphicsS
         //      to create widgets out of the matching URLs, if any
         const KUrl::List urls = KUrl::List::fromMimeData(mimeData);
         foreach (const KUrl &url, urls) {
+            if (AccessManager::supportedProtocols().contains(url.protocol())) {
+                AccessAppletJob *job = AccessManager::self()->accessRemoteApplet(url);
+                dropPoints[job] = dropEvent->scenePos();
+                QObject::connect(AccessManager::self(), SIGNAL(finished(Plasma::AccessAppletJob*)),
+                                 q, SLOT(remoteAppletReady(Plasma::AccessAppletJob*)));
+            } else {
                 KMimeType::Ptr mime = KMimeType::findByUrl(url);
                 QString mimeName = mime->name();
                 QRectF geom(pos, QSize());
                 QVariantList args;
                 args << url.url();
-            //kDebug() << "can decode" << mimeName << args;
+                kDebug() << "can decode" << mimeName << args;
-            //kDebug() << "protocol:" << url.protocol();
+                kDebug() << "protocol:" << url.protocol();
                 KPluginInfo::List appletList = Applet::listAppletInfoForMimetype(mimeName);
                 KPluginInfo::List wallpaperList;
                 if (q->drawWallpaper()) {
@@ -1232,6 +1241,7 @@ void ContainmentPrivate::dropData(QPointF scenePos, QPoint screenPos, QGraphicsS
                 choices->popup(dropEvent->screenPos());
                 dropMenus[job] = choices;
             }
+        }
 
         if (dropEvent) {
             dropEvent->acceptProposedAction();
@@ -1315,6 +1325,23 @@ void ContainmentPrivate::clearDataForMimeJob(KIO::Job *job)
     job->kill();
 }
 
+void ContainmentPrivate::remoteAppletReady(Plasma::AccessAppletJob *job)
+{
+    QPointF pos = dropPoints.take(job);
+    if (job->error()) {
+        //TODO: nice user visible error handling (knotification probably?)
+        kDebug() << "remote applet access failed: " << job->errorText();
+        return;
+    }
+
+    if (!job->applet()) {
+        kDebug() << "how did we end up here? if applet is null, the job->error should be nonzero";
+        return;
+    }
+
+    q->addApplet(job->applet(), pos);
+}
+
 void ContainmentPrivate::mimeTypeRetrieved(KIO::Job * job, const QString &mimetype)
 {
     kDebug() << "Mimetype Job returns." << mimetype;

containment.h

@@ -41,6 +41,7 @@ namespace KIO
 namespace Plasma
 {
 
+class AccessAppletJob;
 class AppletHandle;
 class DataEngine;
 class Package;
@@ -580,6 +581,7 @@ class PLASMA_EXPORT Containment : public Applet
         Q_PRIVATE_SLOT(d, void requestConfiguration())
         Q_PRIVATE_SLOT(d, void updateToolBoxVisibility())
 
+        Q_PRIVATE_SLOT(d, void remoteAppletReady(Plasma::AccessAppletJob *));
         /**
         * This slot is called when the 'stat' after a job event has finished.
         */

private/containment_p.h

@@ -28,9 +28,12 @@ static const int TOOLBOX_MARGIN = 150;
 static const int CONTAINMENT_COLUMNS = 2;
 static const int VERTICAL_STACKING_OFFSET = 10000;
 
+class KJob;
+
 namespace Plasma
 {
 
+class AccessAppletJob;
 class Containment;
 class ToolBox;
 
@@ -83,6 +86,7 @@ public:
     void zoomIn();
     void zoomOut();
     void clearDataForMimeJob(KIO::Job *job);
+    void remoteAppletReady(Plasma::AccessAppletJob *job);
     void mimeTypeRetrieved(KIO::Job *job, const QString &mimetype);
     void containmentActions(KMenu &desktopMenu);
     void appletActions(KMenu &desktopMenu, Applet *applet, bool includeApplet);
@@ -142,8 +146,8 @@ public:
     Containment::Type type;
     static bool s_positioning;
     bool drawWallpaper;
-    QHash<KIO::Job*, QPointF> dropPoints;
+    QHash<KJob*, QPointF> dropPoints;
-    QHash<KIO::Job*, KMenu*> dropMenus;
+    QHash<KJob*, KMenu*> dropMenus;
 };
 
 } // Plasma namespace

remote/accessmanager.cpp

@@ -73,7 +73,7 @@ AccessAppletJob *AccessManager::accessRemoteApplet(const KUrl &location) const
     AuthorizationManager::self()->d->prepareForServiceAccess();
 
     KUrl resolvedLocation;
-    if (location.protocol() == "zeroconf") {
+    if (location.protocol() == "plasma+zeroconf") {
         if (d->zeroconfServices.contains(location.host())) {
             resolvedLocation = d->services[location.host()].remoteLocation();
         } else {
@@ -94,6 +94,13 @@ QList<PackageMetadata> AccessManager::remoteApplets() const
     return d->services.values();
 }
 
+QStringList AccessManager::supportedProtocols()
+{
+    QStringList list;
+    list << "plasma" << "plasma+zeroconf";
+    return list;
+}
+
 AccessManagerPrivate::AccessManagerPrivate(AccessManager *manager)
     : q(manager),
       browser(new DNSSD::ServiceBrowser("_plasma._tcp"))

remote/accessmanager.h

@@ -78,6 +78,11 @@ class PLASMA_EXPORT AccessManager : public QObject
          */
         QList<PackageMetadata> remoteApplets() const;
 
+        /**
+         * @returns a list of supported protocols of urls that can be passed to accessRemoteApplet.
+         */
+        static QStringList supportedProtocols();
+
     Q_SIGNALS:
         /**
          * fires when an AccessAppletJob is finished.